Examples of regional metamorphic rocks include schist and gneiss. Thermal metamorphic rocks, also known as contact metamorphic rocks, are formed by extreme heat along with quite a bit of pressure. The pressure pushes the molten rock against the Earth's surface, causing it to recrystallize. Examples of thermal metamorphic rocks are marble and sandstone
A sedimentary rock is a rock made out of sediments that compacted and cemented together. Metamorphic rock is the result of rocks that have gone through heat and pressure. Three common metamorphic rocks are schist, marble, and gneiss. Metamorphic rocks are denser than most rocks. Temperature can heavily effect how a metamorphic rock changes.
(the 1st two), through the processes of weathering, metamorphism etc. (a) Essential minerals: These are the major constituents of the rock which help in the diagnosis of the rocks types. The disappearance of these minerals would cause the relegation of the rock to another type. (b) Accessory minerals: These are the minor constituents of a rock and their presence has no bearing on the nomenclature of the lock. The minerals commonly occurring in igneous rocks may be broadly classified into felsic and mafic varieties.
Tension [pic] d. Compression 6. What is Earth's core composed of? [pic] a. hydrogen and iron b. magnesium and silicon [pic] c. iron and nickel d. nickel and silicon 7. A large ocean wave that is generated by vertical motions of the seafloor during an earthquake is called a(n) __________. a. upwelling current b. seiche [pic] c. tsunami d. tidal range 8.
J. Subbiondo © 2004The CrustThe outer layer of the Earth is called the crust. It is made up of rock that floated to the surface when the Earth was formed. It is not a continuous layer, but is made up of large masses called tectonic plates.These plates drift slowly across the Earth's surface (tectonic means moving).The movement of these plates creates mountains and valleys.At weak points in the crust, it causes volcanic eruptions. And when plates bump into each other, earthquakes occur -- emitting shock waves or vibrations called seismic waves. The crust is the Earth's coldest layer.
Earthquake shaking and damage is the result of three basic types of elastic waves. Two of the three propagate within a body of rock. The faster of these body waves is called the primary or P wave. Its motion is the same as that of a sound wave in that, as it spreads out, it alternately pushes (compresses) and pulls (dilates) the rock. These P waves are able to travel through both solid rock, such as granite mountains, and liquid material, such as volcanic magma or the water of the oceans.
Such properties are luster, the way light is reflected off of a mineral and whither or not it is metallic or non-metallic, hardness, the resistance to scratching, gravity, the density of the mineral compared to water, fracture, irregular surface breakage and cleavage, breakage on flat planes. METHOD: The supplies needed for this lab are all included in the mineral kit, which was required for this course; it includes a glass plate, a small bottle of acid, a hand lens, a magnet, a streak plate and one small knife. 1. Read over the introduction and explanations of the minerals properties. 2.
Sedimentary Rocks The Beginning Sedimentary rocks are some of the foundations of the earth. They range from rock salt, to gypsum, slate, sandstone, limestone, and even coal. The grains of these rocks range from a coarse grain like cement, to very fine that only a microscope can see the grain. Where do these rocks come from? How are these sedimentary rocks formed?
Alfred could not explain how the huge masses of land could have moved so far. The major means for the lithospheric plates to float on the asthenosphere comes from the process of convection in the mantle of the Earth. Heat from the outer core rises in the mantle and “melts” the upper part, which is called the asthenosphere. The plates of the lithosphere move in three main ways. There are divergent boundaries where the plates are moving away from each other and new land is formed as magma is released from inside the mantle.
This is founded on dissimilarities in mechanical properties and in the procedure for the transfer of heat. Theoretically, the lithosphere is cooler and harder, while the Asthenosphere is hotter and flows more easily. The key principle of tectonic movement is that the lithosphere exists as separate and distinct tectonic plates, which ride on the fluid-like Asthenosphere. The geological position where two plates rendezvous is called a plate boundary. Plate boundaries are routinely affiliated with geological events such as earthquakes and are responsible for geological enrichment by conceiving topographic characteristics such as hills, volcanoes, mid-ocean ridges, and oceanic trenches.